Estádio: Court 5 Round: 25 Ground: Hardcourt outdoor
| ITF - M15 Rochester | 2019/06/30 16:00 | Diego Hidalgo v Strong Kirchheimer | 7-6,7-6 |
| ITF - M15 Champaign | 2019/06/08 17:00 | Strong Kirchheimer v Diego Hidalgo | 5-7,6-3,6-3 |
| Challenger - Orlando | 2021/06/06 16:20 | Strong Kirchheimer v Nicolas Alvarez | 3-6,5-7 |
| Challenger - Little Rock | 2021/05/31 15:00 | Stefan Kozlov v Strong Kirchheimer | 6-3,6-2 |
| Challenger - Little Rock | 2021/05/30 19:40 | Strong Kirchheimer v Aleksandar Kovacevic | 6-4,6-7,7-6 |
| ITF - M25 Pensacola | 2021/05/20 14:25 | Strong Kirchheimer v Nicolas Kicker | 6-4,5-7,2-6 |
| ITF - M25 Pensacola | 2021/05/19 18:00 | Strong Kirchheimer v Ricardo Rodriguez-Pace | 6-4,6-3 |
| Challenger - Tallahassee | 2021/04/19 16:45 | Alexander Ritschard v Strong Kirchheimer | 6-0,7-6 |
| Challenger - Tallahassee | 2021/04/19 00:20 | Strong Kirchheimer v Denis Yevseyev | 6-4,4-6,6-4 |
| Challenger - Cleveland | 2021/03/15 14:00 | Strong Kirchheimer v Alexis Galarneau | 6-7,6-1,4-6 |
| ITF - M25 São Domingos | 2021/06/10 12:50 | Evan Zhu v Diego Hidalgo | 6-2,6-3 |
| ITF - M25 São Domingos | 2021/06/09 13:00 | Adam El Mihdawy v Diego Hidalgo | 4-6,6-7 |
| ITF - M25 São Domingos | 2021/06/03 15:55 | Kyle Seelig v Diego Hidalgo | 6-2,6-4 |
| ITF - M25 São Domingos | 2021/06/01 15:55 | Gerardo L Villasenor v Diego Hidalgo | 6-4,3-6,3-6 |
| Challenger Salinas 2 | 2021/04/27 16:15 | Adrian Menendez-Maceiras v Diego Hidalgo | 7-5,6-0 |
| Challenger - Salinas | 2021/04/20 15:50 | Diego Hidalgo v Nicolas Mejia | 3-6,6-1,5-7 |
| ITF - M25 Naples | 2021/02/26 15:55 | Corentin Denolly v Diego Hidalgo | 6-2,6-2 |
| ITF - M25 Naples | 2021/02/25 18:10 | Diego Hidalgo v Louis Wessels | 6-2,6-4 |